package com.wfw.mmall.service.impl;

import java.util.UUID;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.wfw.mmall.common.Const;
import com.wfw.mmall.common.ServerResponse;
import com.wfw.mmall.common.TokenCache;
import com.wfw.mmall.dao.UserMapper;
import com.wfw.mmall.pojo.User;
import com.wfw.mmall.service.IUserService;
import com.wfw.mmall.util.MD5Util;

/**
 * @author F7689334
 *
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

	@Autowired
	private UserMapper userMapper;

	@Override
	public ServerResponse<User> login(String username, String password) {
		int resultCount = userMapper.checkUsername(username);
		if (resultCount == 0) {
			return ServerResponse.createByErrorMessage("用户名不存在");
		}

		String md5Password = MD5Util.MD5EncodeUtf8(password);

		User user = userMapper.selectLogin(username, md5Password);
		if (user == null) {
			return ServerResponse.createByErrorMessage("密码错误");
		}

		user.setPassword(StringUtils.EMPTY);

		return ServerResponse.createBySuccess("登录成功", user);
	}

	@Override
	public ServerResponse<String> register(User user) {
		/**
		 * 验证用户名和邮箱是否已被注册, 如果已被注册则直接返回包含错误信息的validResponse
		 */
		ServerResponse validResponse = this.checkValid(user.getUsername(), Const.USERNAME);
		if (!validResponse.isSuccess()) {
			return validResponse;
		}
		validResponse = this.checkValid(user.getEmail(), Const.EMAIL);
		if (!validResponse.isSuccess()) {
			return validResponse;
		}

		// int resultCount=userMapper.checkUsername(user.getUsername());
		// if (resultCount>0) {
		// return ServerResponse.createByErrorMessage("用户名已存在");
		// }
		// resultCount=userMapper.checkEmail(user.getEmail());
		// if (resultCount>0) {
		// return ServerResponse.createByErrorMessage("email已存在");
		// }

		user.setRole(Const.Role.ROLE_CUSTOMER);

		// 密码MD5加密
		user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));

		int resultCount = userMapper.insert(user);
		if (resultCount == 0) {
			return ServerResponse.createByErrorMessage("注册失败");
		}
		return ServerResponse.createBySuccessMessage("注册成功");
	}

	@Override
	public ServerResponse<String> checkValid(String str, String type) {
		if (StringUtils.isNotBlank(type)) {
			// 验证类型不是空白,开始校验
			if (Const.USERNAME.equals(type)) {
				int resultCount = userMapper.checkUsername(str);
				if (resultCount > 0) {
					return ServerResponse.createByErrorMessage("用户名已存在");
				}
			}
			if (Const.EMAIL.equals(type)) {
				int resultCount = userMapper.checkEmail(str);
				if (resultCount > 0) {
					return ServerResponse.createByErrorMessage("email已存在");
				}
			}
		} else {
			return ServerResponse.createByErrorMessage("参数错误");
		}
		return ServerResponse.createBySuccessMessage("校验成功");
	}

	@Override
	public ServerResponse<String> seleteQuestion(String username) {
		ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
		if (validResponse.isSuccess()) {
			return ServerResponse.createByErrorMessage("用户不存在");
		}
		String question = userMapper.selectQuestionByUsername(username);
		if (StringUtils.isNotBlank(question)) {
			return ServerResponse.createBySuccess(question);
		}
		return ServerResponse.createByErrorMessage("找回密码的问题是空的");
	}

	@Override
	public ServerResponse<String> checkAnswer(String username, String question, String answer) {
		int resultCount = userMapper.checkAnswer(username, question, answer);
		if (resultCount > 0) {
			// 问题及问题答案是该用户的,并且答案正确
			String forgetToken = UUID.randomUUID().toString();
			TokenCache.setKey(TokenCache.TOKEN_PREFIX + username, forgetToken);
			return ServerResponse.createBySuccess(forgetToken);
		}
		return ServerResponse.createByErrorMessage("问题的答案错误");
	}

	@Override
	public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken) {
		if (StringUtils.isBlank(forgetToken)) {
			return ServerResponse.createByErrorMessage("参数错误,token需要传递");
		}
		ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
		if (validResponse.isSuccess()) {
			return ServerResponse.createByErrorMessage("用户不存在");
		}
		// 取本地缓存的token
		String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
		if (StringUtils.isBlank(token)) {
			return ServerResponse.createByErrorMessage("token无效或过期");
		}
		// 将本地token与服务器传过来的进行比较
		if (StringUtils.equals(forgetToken, token)) {
			String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
			int rowCount = userMapper.updatePasswordByUsername(username, md5Password);

			if (rowCount > 0) {
				return ServerResponse.createBySuccessMessage("修改密码成功");
			}
		} else {
			return ServerResponse.createByErrorMessage("token错误,请重新获取重置密码的token");
		}
		return ServerResponse.createByErrorMessage("修改密码失败");
	}

	@Override
	public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user) {
		// 防止横向越权,要校验这个用户的旧密码,一定要指定是该用户.
		// 因为我们会查询一个count(1),如果不指定id,那么结果就是true
		int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
		if (resultCount == 0) {
			return ServerResponse.createByErrorMessage("旧密码错误");
		}

		user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
		int updateCount = userMapper.updateByPrimaryKeySelective(user);
		if (updateCount > 0) {
			return ServerResponse.createBySuccessMessage("密码更新成功");
		}
		return ServerResponse.createByErrorMessage("密码更新失败");
	}

	@Override
	public ServerResponse<User> updateInfomation(User user) {
		// username不能被更新
		int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
		if (resultCount > 0) {
			return ServerResponse.createByErrorMessage("email已存在,请更换email再尝试更新");
		}

		User updateUser = new User();
		updateUser.setId(user.getId());
		updateUser.setUsername(user.getUsername());
		updateUser.setEmail(user.getEmail());
		updateUser.setPhone(user.getPhone());
		updateUser.setQuestion(user.getQuestion());
		updateUser.setAnswer(user.getAnswer());

		int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
		if (updateCount > 0) {
			return ServerResponse.createBySuccess("更新个人信息成功", updateUser);
		}
		return ServerResponse.createByErrorMessage("更新个人信息失败");
	}

	@Override
	public ServerResponse<User> getInformation(Integer id) {
		User user = userMapper.selectByPrimaryKey(id);
		if (user == null) {
			return ServerResponse.createByErrorMessage("找不到当前用户");
		}
		user.setPassword(StringUtils.EMPTY);
		return ServerResponse.createBySuccess(user);
	}

	// backend
	@Override
	public ServerResponse checkAdminRole(User user) {
		if (user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN) {
			return ServerResponse.createBySuccess();
		}
		return ServerResponse.createByError();
	}

}
